Module record 

WAL record format.

On-disk layout (all fields little-endian):

┌──────────┬─────────────────┬────────────┬─────┬───────────┬───────────┬─────────────┬─────────┐
│  magic   │ format_version  │ record_type│ lsn │ tenant_id │ vshard_id │ payload_len │ crc32c  │
│  4 bytes │    2 bytes      │   2 bytes  │ 8B  │   4 bytes │  2 bytes  │   4 bytes   │ 4 bytes │
└──────────┴─────────────────┴────────────┴─────┴───────────┴───────────┴─────────────┴─────────┘
Total header: 30 bytes
Followed by: [payload_len bytes of payload]

Structs

RecordHeader

WAL record header (fixed 30 bytes).

WalRecord

A complete WAL record: header + payload.

Enums

RecordType

Record type discriminants.

Constants

ENCRYPTED_FLAG

Bit 14 in record_type signals that the payload is AES-256-GCM encrypted. This is separate from bit 15 (required flag).

HEADER_SIZE

Size of the record header in bytes.

MAX_WAL_PAYLOAD_SIZE

Maximum WAL record payload size (64 MiB). Distinct from cluster RPC’s limit.

WAL_FORMAT_VERSION

Current WAL format version.

WAL_MAGIC

Magic number identifying a NodeDB WAL record.